MFC - CSocket & CAsyncSocket

[jaganlal]

How to broadcast data using MFC (either with CSocket/CAsyncSocket)?
Pl.give a detailed explanation.URGENT
mail id : jaganlal@hotmail.com

[Dan Ramage]

The only "trick" to setting a socket up for broadcast is setting the socket option. Here is a snippet of code to do that:

return_code = CAsyncSocket::Create( 3000, SOCK_DGRAM, FD_READ | FD_CLOSE, NULL );
if( return_code == TRUE )
{
int sock_opt_value = 1;
return_code = CAsyncSocket::SetSockOpt( SO_BROADCAST, &sock_opt_value, sizeof( BOOL ), SOL_SOCKET );
}

I picked 3000 as the port number to broadcast on in the Create function just because it seemed like a nice high number.
That's about all there is to it.

Dan